Cleaning and scouring hot rolls



(No Model.)

w. HfBAN FIELD. CLEANING AND SOOURING HOT ROLLS.

Patented Dec. 26

IIIIIIIL 35 i when hot is very desirable, and the object of r UNITED. STATES PATE T OFFICE.

I WILLIAM H. BA NFIELD, OF IRONDALE, OHIO.

CLEANING AND S COU RI'NG HOT ROLLS."

SPECIFICATION forming part of Letters Patent No. 511,493, dated December 26, 1893.

Application filed December 8,1892. sera1r0..454,495. (No model.)

To 00% whom it may concern.-

Be it know'n'that-I, WILLIAM H. BANFIELD, a resident of Irondale, in the county of J efferson and State of Ohio, have invented a new and useful Improvement in Cleaning and Scouring Hot Rolls; and I do hereby declare the following to be a full, clear, and exact'description thereof. I

My invention relates to the cleaning or scouring of hot rolls, that is, of rolls for rolling sheet or plate metalto which particles of scale, oxide, or other such matters, adhere and are pressed into the surfaces of the metal passing between the rolls so as to form rough surfaces thereon. These particles of metallic oxide gather in innumerable quantities on the surfaces of the rolls, and, though recognized as a diificulty which it is desired to overcome, the rolls havebeen used with such oxide adhering thereto because no proper means for scouring the rolls when hot was provided. Such rolls have been scoured when cold by means of suitable devices adapted to press the emery or scouring material against the same, but that required the cooling down of the rolls which occupied a day or more and a subsequent re-heating of the.rolls,which could only be done by the passing of plates or sheets through, the plates orsheets so formed being either of poor quality or, in some cases, so imperfect that they could not be used commercially, and a loss of at least two days being occasioned at each time that said rolls were scoured when cold. It is therefore e'vi dent that a means for scouring these rolls my invention is to provide such means.

- To these ends my invention consists, generally stated, in driving each roll by power and inserting between the rolls a suitable non-combustible support for the grinding material, itself protected so as to prevent the burning of the body thereof by the heat of the rolls, and by such support holdingthe grinding or scouring material up against the roll faces, .it being found that the rolls can be properly scoured in this'way even at the ordinary heat at which they are best suited for rolling the plates or sheets, and that no time further than that occupied in scouring need .be lost in the operation of the rolls.

It also consists in certain improvements in the devices employed.

'lo enableothers skilled in the art to practice my invention, I will describe the-same 5 5 more fully, referring 'to the accompanying drawings, in which- Figure 1 is a sectional view of a set of rolls illustrating the scouring operation. Fig. 2 is an end viewthereof, and Fig. 3 is a perspective View of the scouring device embodying my invention. Fig. 4 is an enlarged view showing the rolls and'scouring device. Figs. 5 and 6 are detail views of thefpinion and connection.

Like letters of 'reference indicate like parts in each. g

The rolls illustrated in the drawings are the ordinary two high sheet rolls, these rolls, under ordinary circumstances, driven, the one bypower and'the other by friction, it being found that a more even rolling operation can be thus produced. These rolls gatheron their faces the particles of iron oxide, scale, &c., above referred to, the same being held thereto in minute particles, such as in pin points, or in small grains oratoms, the whole mass of the rolling surface being covered with such particles after-the rolls have been used for a considerable-time. In order to arrange the rolls for the scouring thereof in accordance with myinvention, I provide suitable gearing connecting the two rolls, as shown in Fig. 2.- In said figured is the housing, 6- the upper roll, 0 the lower roll, and (Z the adjusting screws by which the upper roll is ad- 8 5 justcd upon-the lower roll, the lower roll being generally driven bysuitable connections from the engine. When the rolls are to be scoured, I place upon the upper roll asuitable pinion'e gearing with a pinion face f vconnected to the lower roll, such as on .the I coupling collar f, or place such pinions c and f upon both rolls, so asto drive them together.

In the drawings'this pinion e is provided with curved cheeks e projectingvfro n it and engaging with the wabbler of the roll, the pinion being secured to the wabbler. by a bolt c2. For the grinding operation the upper rollis curved faces 70.

raised to some extent, so that it will be driven without contact with the other.

For the purpose of supporting the grinding and scouring materials, I provide the scouring wedge g, which is more clearly shown in Fig. 3, that wedge having the tongue h which passes between the two rolls to properly support the scouring wedge in place, and above said tongue the curved faces which conform approximately to the curve or circle of the rolls; the wedge having the handle Z for manipulating the same. This wedge is preferably formed of wood, or like fibrous material, which, if subjected to heavy strain, will be simply crushed without fear of accident by the flying of the parts thereof. The wood has also the further advantage of being a nonconductor when properly protected, and so holding the heat up to the roll surfaces,which assists in scouring. At the heat at which the rolls are heated, however, in connection with the friction between the securing wedge and rolls, .the wooden wedge would soon ignite. To prevent this, I provide it with a sheet metal covering on the surfaces exposed to the frictional action, such covering being shown at mt around the tongue hand along the Such covering also prefer ably extends up over the bodyportion n of the wedge. the supporting face for the securing material, which is preferably formed of emery, or other proper scouring or grinding granular material, mixed with a roll-grease capable of withstanding a high heat. Such greases are now made to withstand the heat of the roll without ignition, and therefore form a proper substance for holding the emery to place. They areknown as hot neck grease. Such hot neck grease and emery are properly intermingled to form the scouring compound.

In practicing the invention, the wedge is coatedwith a compound of this roll-grease and emery which is laid in a thick coating upon the metallic covering 071 along the curved faces 70 and the faces of the wedge g, and when it is desired to scour the rolls they are geared to gether in the manner above described, the upper roll is loosened so as to permit theinsertion of the wedge,while the rolls are driven at the proper speed, practically the speed at which the mill is run, the wedge is inserted between the rolls and the curved faces carrying the scouring. material brought up against the same so as to act to scour the rolls while in the heated condition at which they had been employed in rolling the metal. The operator moves the scouring'wedge along the faces of the rolls, applying such pressure as he finds proper for the purpose, the tongue 77. of the wedge supporting the same in position so that the only requirement is for the operator to apply the proper force for scouring and to move the scouring wedge along so as to cause the scouring and cleaning of the en- This metallic covering m forms tire surface of the rolls. In such operation it is evident that if the movement of the rolls is such as would grasp and carry'any wedge, there is practically no danger to the operator, as the only effect would be to crush the wedge itself which is formed of such fibrous material as would not fly or lead to serious accident. At the same time, the heat from the rolls themselves, or created by the friction of the rolls upon the securing wedge, will not affect the body of the wedge, as the metallic covering on interposed between the rolls and such body takes the force of the roll and prevents the ignition of the wood by direct contact of the wedge body with the rolls. This wedge may be formed, ifndesired, of, wrought iron, though such material is not considered as desirable as the wood, as in case the wedge were drawnwithin the roll, thoughthe wrought metal wedge would not be so liable tofracture as a cast metal wedge, yet it would be liable to injure or break the rolls and would be more quickly heated by conduction, which might affect the action of the scouring =materials upon the rolls. The wooden wedge would, of course, be crushed if caughtwith and carriedinto the rolls, and no injury would occur to the rolls themselves.

During the scouring operation the materials for scouring, that is, thecompound containing emery, may be replenished, as found necessary, or the emery may beaddedtothe supporting material so as to cause a proper and even scouring of the rolls. It is found by practicaluse that by this means the rolls can be quickly and evenly scoured, while at the same heat at which they are most successfully employed for the rolling of metal, and that the only time necessarily consumed is that of gearing the rolls together and scouring them by means of the compound applied by the wedge, after which operations the rolling can he proceeded with at once. It is found that by such means all these small particles of metallic oxide, or other such materials, can be entirely removed from the rolls, and the clean metallic surface desirable for rolling be again exposed.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The herein-described method of scouring rolls for rolling metal when the same are heated, consisting in driving both rolls by power connections and inserting between-" them a suitable non-combustible support and therebyholdingthe scouringmaterials against the faces of the rolls, substantially as set forth.

2. A scouring device for rolls, consistingof a suitable block having a non-combustible face and curved corresponding to the roll face, and adapted to hold the scouring mate rial against the same, substantially as set forth.

3. A scouring device for rolls, consisting of a wedge block having a tongue extending out 511,493 I i i 3 therefrom and adapted to pass between the ing a metallic covering, substantially as set 7 rolls, and curved scouring faces at the base forth. 7, [O of said tongue, said wedge block havinga non- In testimony whereof I, the said WILLIAM combustible face to contact with the roll H. BANFIELD, have hereunto set my hand; faces, substantially as set forth. 7 WM. H; BANFIELD;

4. A scouring device for rolls, formed of Witnesses: v I I wood, and having a curved face correspond- WM. DOWNER, ing to the'roll face, such curved face hav- W. E. BURTON. I 

